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Wouxun wouxun kg uv8d: how to use the duplex feature?

Jhernan488

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May 28, 2018
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Arizona
Okay, I'm confused on how this works. I just made a contact on so 50... I thought the duplex mode was active, I could still hear the squelch in my headphones when I keyed up... But I didn't hear myself talking on the rx side... Someone did respond to me so I know I got through.

How can I test this duplex mode out?
 

ko6jw_2

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I think that you don't understand the term duplex in the context of your radio. It really means semi-duplex. You transmit on one frequency and receive on another, but not at the same time. This mode is used to access repeaters. You talk on the repeater input and your signal is transmitted on the repeater output. The radio cannot transmit and receive at the same time. Repeaters can do this because the have filters (duplexers) that isolate the transmitter and receiver. Without them the receiver would overload.

What is "50"?
 

vagrant

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@ko6jw_2 The OP is referring to SO-50 (Saudi Sat) which is an FM satellite. I made my first contact via that satellite.

@Jhernan488 As you found you don't "need" full duplex, but it helps to know you're making it to the bird when you hear yourself. The Kenwood D72A handheld will provide what you need...but do you really need it? Some, perhaps many, people use a separate receiver or transceiver to monitor the RX side. Take a read of this page. Full Duplex: The Key To Satellite Success – OnAllBands

I have a D72A, but I am transitioning to a Kenwood D74A and a Yaesu 817ND along with my Icom R30. The R30 has a built-in recording feature which is nice. Plus, it will handle FM as well as SSB for the other satellites. Still, just the D74 and 817 together could handle FM or SSB. The D74A would just be the receiver and record as well.
 
Last edited:

Jhernan488

Member
Joined
May 28, 2018
Messages
84
Location
Arizona
I think that you don't understand the term duplex in the context of your radio. It really means semi-duplex. You transmit on one frequency and receive on another, but not at the same time. This mode is used to access repeaters. You talk on the repeater input and your signal is transmitted on the repeater output. The radio cannot transmit and receive at the same time. Repeaters can do this because the have filters (duplexers) that isolate the transmitter and receiver. Without them the receiver would overload.

What is "50"?
The kguv8d is supposed to be able to do that. I have the rimlink repeater system near me, I tune to the VHF repeater, and the UHF repeater and I can hear myself talking... It's supposed to be able to do that for UHF/VHF and VHF/UHF. But it only works when doing UHF/VHF. SO-50, it's an amateur radio satellite.
 

Jhernan488

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Joined
May 28, 2018
Messages
84
Location
Arizona
@ko6jw_2 The OP is referring to SO-50 (Saudi Sat) which is an FM satellite. I made my first contact via that satellite.

@Jhernan488 As you found you don't "need" full duplex, but it helps to know you're making it to the bird when you hear yourself. The Kenwood D72A handheld will provide what you need...but do you really need it? Some, perhaps many, people use a separate receiver or transceiver to monitor the RX side. Take a read of this page. Full Duplex: The Key To Satellite Success – OnAllBands

I have a D72A, but I am transitioning to a Kenwood D74A and a Yaesu 817ND along with my Icom R30. The R30 has a built-in recording feature which is nice. Plus, it will handle FM as well as SSB for the other satellites. Still, just the D74 and 817 together could handle FM or SSB. The D74A would just be the receiver and record as well.
Yeah, I actually seen a video of using 2 radios after I posted this. Seems to be better than a duplex radio. I have plenty of uv5rs I can use on the rx end. I'll have to give this a try!
 

vagrant

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Ahhh..okay cool. I did not know the KGUV8D offered that. Unfortunately, one cannot adjust the RX frequency while transmitting on the KGUV8D. Well, I am doubtful based on the single dial.

As to the UV5RS and other inexpensive radios, it is worth a try but it may be overloaded when you TX nearby...even when transmitting on a different band. Still, it is worth a try. That is part of the fun with amateur radio, experimenting.
 

Jhernan488

Member
Joined
May 28, 2018
Messages
84
Location
Arizona
Ahhh..okay cool. I did not know the KGUV8D offered that. Unfortunately, one cannot adjust the RX frequency while transmitting on the KGUV8D. Well, I am doubtful based on the single dial.

As to the UV5RS and other inexpensive radios, it is worth a try but it may be overloaded when you TX nearby...even when transmitting on a different band. Still, it is worth a try. That is part of the fun with amateur radio, experimenting.
Well I tried it, and I couldn't hear myself at all besides open squelch. But I could hear others responding to me.... I guess I need better radios.
 
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